Virtual Machines

Virtual Machines (VMs) offer flexible and customizable resources to meet the varied needs of applications. Hikube provides several VM series adapted to different scenarios, as well as preferences for guest operating systems.

---

Configuration Example

Here is a YAML configuration example for a VM using a CX type instance with Ubuntu as the operating system:

apiVersion: apps.cozystack.io/v1alpha1
kind: VirtualMachine
metadata:
  name: vm-example
spec:
  instanceType: "cx1.xlarge"
  guestOS: "ubuntu"
  disks:
    - name: "root-disk"
      size: "20Gi"
      storageClass: "replicated"
  networks:
    - name: "default"
      type: "bridge"

Using the kubeconfig provided by Hikube and this example yaml, saved as a manifest.yaml file, you can easily test the application deployment using the following command:

kubectl apply -f manifest.yaml

---

Available Series

U Series

• Description: Designed for general applications. VMs share physical cores on a time basis.
• Characteristics:
  • Burstable CPU Performance: Computing performance can exceed the base limit if additional resources are available.
  • vCPU-To-Memory Ratio: 1:4, to reduce noise per node.

---

O Series

• Description: Based on the U series with overcommitted memory.
• Characteristics:
  • Burstable CPU Performance: Like the U series.
  • Overcommitted Memory: Allows higher load density.
  • vCPU-To-Memory Ratio: 1:4.

---

CX Series

• Description: Provides exclusive resources for compute-intensive applications.
• Characteristics:
  • Hugepages: Improved memory performance.
  • Dedicated CPU: Each vCPU is associated with a physical core.
  • Isolated Emulator Threads: Reduced impact of emulation threads.
  • vNUMA: Cache optimization through physical NUMA topology.
  • vCPU-To-Memory Ratio: 1:2.

---

M Series

• Description: Designed for memory-intensive applications.
• Characteristics:
  • Hugepages: Improved memory performance.
  • Burstable CPU Performance: Allows variable performance.
  • vCPU-To-Memory Ratio: 1:8.

---

RT Series

• Description: Ideal for real-time applications (e.g., Oslat).
• Characteristics:
  • Hugepages: Memory performance optimization.
  • Dedicated CPU: High computing guarantees.
  • Isolated Emulator Threads: Reduced impact of emulation threads.
  • vCPU-To-Memory Ratio: 1:4 (from medium size and up).

---

Available Resources

Instance Types

Name	vCPUs	Memory
cx1.medium	1	2Gi
cx1.large	2	4Gi
cx1.xlarge	4	8Gi
cx1.2xlarge	8	16Gi
cx1.4xlarge	16	32Gi
cx1.8xlarge	32	64Gi
m1.large	2	16Gi
m1.xlarge	4	32Gi
m1.2xlarge	8	64Gi
m1.4xlarge	16	128Gi
m1.8xlarge	32	256Gi
…	…	…

---

Guest Operating Systems

Name	Description
ubuntu	Ubuntu
fedora	Fedora (amd64)
centos.stream9	CentOS Stream 9
rhel.9	Red Hat Enterprise Linux 9 (amd64)
windows.11	Microsoft Windows 11
windows.2k22.virtio	Microsoft Windows Server 2022 (virtio)
alpine	Alpine
cirros	Cirros
…	…